[iOS Clean] Added JavaScript dialog support.

ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_coordinator.h

Index: ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_coordinator.h
diff --git a/ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_coordinator.h b/ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_coordinator.h
new file mode 100644
index 0000000000000000000000000000000000000000..3a882b3adcc85bd6940bc9eb9840ae115a38eb71
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/dialogs/java_script_dialogs/java_script_dialog_coordinator.h
@@ -0,0 +1,25 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_COORDINATOR_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_COORDINATOR_H_
+
+#import <Foundation/Foundation.h>
+
+#import "ios/clean/chrome/browser/ui/overlays/overlay_coordinator.h"
+
+@class JavaScriptDialogState;
+
+// A coordinator for the UI elements used to present JavaScript dialogs.
+@interface JavaScriptDialogCoordinator : OverlayCoordinator
+
+// Designated initializer to display a JavaScript dialog for |state|.
+- (instancetype)initWithState:(JavaScriptDialogState*)state
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithWebState:(web::WebState*)webState NS_UNAVAILABLE;
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_JAVA_SCRIPT_JAVA_SCRIPT_DIALOG_COORDINATOR_H_